You forgot, the ability to install 30GBs+ of development tools on all 4 different machines in less than 30 minutes, not counting the initial download, download ONE TIME, from developer.apple.com, which could be anywhere from 10-40 minutes. But once you have that and the simulators... BOOM BOOM BOOM. A portable drive and 4 machines can be loaded in under 30 minutes!

Gone are the days of complaining about long installs!!